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Taiwan Semiconductor Corporation SMB10J26CAH
- Part No.:
- SMB10J26CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J26CAH.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,795
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Product details
Overview
SMB10J26CAH from Taiwan Semiconductor is a bidirectional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 26V standoff voltage (VWM), 28.9–31.9V breakdown voltage (VBR), 42.1V clamping voltage (VC) at 23.8A peak pulse current, and AEC-Q101 qualification for automotive-grade surge protection in power supply and interface lines.
For engineers reviewing the SMB10J26CAH datasheet, SMB10J26CAH pinout, SMB10J26CAH application, or SMB10J26CAH equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, 175°C maximum junction temperature, low-profile SMB package suitability for automated SMT assembly, and verified performance under 10/1000μs surge waveforms.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to deliver fast transient response (<1.0ps) and stable clamping across repeated surges. Its symmetrical I-V characteristics enable identical protection for positive and negative transients without polarity dependence.
The device operates within -55°C to +175°C junction temperature range and features 20°C/W junction-to-lead thermal resistance, supporting reliable power dissipation in high-temperature automotive environments. It meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum continuous reverse working voltage before clamping begins |
| VBR @ IT=1mA | 28.9–31.9 V - Verified breakdown threshold ensuring predictable turn-on during overvoltage events |
| VC @ IPPM=23.8A | 42.1 V - Clamped voltage limiting downstream circuit stress during 10/1000μs transients |
| PPK | 1000 W - Peak pulse power handling per single 1ms surge, derated above 25°C ambient |
| TJ max | +175 °C - Enables operation in under-hood automotive locations and industrial power systems |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.110g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AA (SMB) package: cathode band marking denotes polarity; bidirectional configuration means both terminals are functionally symmetric with no designated anode/cathode for AC transients.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals conduct equally during ± voltage excursions; no DC polarity dependency |
| Case (body) | Thermal and mechanical interface | Exposed metal-free plastic body; heat transfer occurs via leads only (RθJL = 20°C/W) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics including engine control, lighting, and infotainment modules |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Guaranteed immunity against load dump, inductive switching, and battery connection transients in 12V vehicle systems |
| Glass-passivated junction | Stable VBR tolerance and long-term leakage stability under thermal cycling and humidity exposure |
| Fast response time <1.0ps | Clamps before sensitive ICs experience damaging overvoltage-critical for CAN, LIN, and sensor interfaces |
Applications
| Automotive Lighting Systems | Body Control Modules (BCM) |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontrollers from load-dump transients during headlamp switching. IC Role / Device Role: Bidirectional clamping element placed across power input rails upstream of DC-DC converters. Use Value: Limits voltage to ≤42.1V during 100V/100ms load dump (ISO 7637-2 Pulse 5a), preventing latch-up or gate oxide damage. | Use Scenario: Safeguarding LIN bus transceivers and relay drivers from ESD and inductive kickback in door modules. IC Role / Device Role: Secondary-level TVS on 12V supply and signal lines, complementing primary front-end protection. Use Value: Withstands ≥15kV contact ESD (IEC 61000-4-2) and clamps 30A 8/20μs surges to <45V, preserving communication integrity. |
| Engine Control Units (ECU) | Industrial Power Supplies |
Use Scenario: Shielding MCU I/O and sensor inputs from alternator ripple and ignition coil coupling. IC Role / Device Role: Localized TVS on analog sensor inputs (e.g., MAP, TPS) and CANH/CANL differential pairs. Use Value: Maintains signal fidelity by clamping sub-100ns spikes to <42.1V while adding <0.5pF capacitance-no data corruption. | Use Scenario: Protecting AC-DC rectifier outputs and DC bus inputs in DIN-rail mounted PSUs exposed to lightning-induced surges. IC Role / Device Role: Primary surge suppression stage before bulk capacitors and switching controllers. Use Value: Absorbs 1000W peak pulses (10/1000μs) without degradation, enabling compliance with IEC 61000-4-5 Level 3 (2kV line-earth). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA | Same DO-214AA package, 26V VWM, but rated at 600W PPK (vs. 1000W); VC = 42.1V @ 14.3A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump | Select SMB10J26CAH when full 1000W surge margin is required in automotive front-end protection. |
| SMCJ26CA | DO-214AB (SMC) package, same 26V VWM, 1500W PPK, VC = 42.1V @ 35.7A; larger footprint (7.11 × 6.22 mm vs. 4.57 × 3.94 mm) | Higher power rating but incompatible PCB layout; requires redesign for pad area and thermal relief | Choose SMB10J26CAH where space-constrained SMB footprint and AEC-Q101 compliance are mandatory. |
Compared with SMBJ26CA and SMCJ26CA, SMB10J26CAH uniquely delivers 1000W surge capacity in the compact SMB outline with certified AEC-Q101 reliability-making it optimal for space-limited, high-surge automotive nodes where drop-in replacement isn't possible but performance and qualification are non-negotiable.
Availability
SMB10J26CAH is available at Aetrix Electronics and suitable for automotive lighting systems, body control modules, engine control units, and industrial power supplies requiring stable component supply, AEC-Q101 qualification, and consistent 1000W transient suppression performance.
Supply support for SMB10J26CAH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global distribution and AEC-Q101-compliant production lines.
The SMB10JxxCAH series was developed specifically for automotive-grade transient suppression, targeting robust, low-profile, high-power TVS solutions compliant with ISO 7637-2 and meeting stringent under-hood thermal and reliability requirements.
FAQ
What does the 'CAH' suffix indicate in SMB10J26CAH?
The 'CAH' suffix in SMB10J26CAH denotes a bidirectional TVS diode in DO-214AA (SMB) package with halogen-free construction per IEC 61249-2-21. Unlike unidirectional variants ending in 'AH', the 'C' confirms symmetrical clamping for both polarities-essential for protecting AC-coupled or differential signal paths. SMB10J26CAH maintains identical electrical specs in either direction, with no anode/cathode orientation requirement during placement.
Is SMB10J26CAH suitable for ISO 7637-2 Pulse 5a (load dump) protection?
Yes, SMB10J26CAH is explicitly validated for ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b-and its 1000W peak pulse rating and 42.1V clamping voltage at 23.8A make it appropriate for Pulse 5a mitigation when used with appropriate series impedance. The device's 175°C junction rating and AEC-Q101 qualification ensure survivability under repeated 100V/400ms load dump events typical in 12V automotive systems.
What is the maximum clamping voltage of SMB10J26CAH and at what test condition?
The maximum clamping voltage of SMB10J26CAH is 42.1 V, measured at a peak pulse current (IPPM) of 23.8 A using the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range (-55°C to +175°C) and defines the upper voltage limit imposed on protected circuits during worst-case transients.
Does SMB10J26CAH require heatsinking in standard PCB layouts?
No additional heatsink is required for SMB10J26CAH under typical surge conditions, as its DO-214AA package provides sufficient thermal conduction via copper traces. With RθJL = 20°C/W and steady-state power dissipation (PD) rated at 5 W, standard 1 oz. copper pads with ≥25 mm² thermal relief meet thermal needs for intermittent 1000W pulses. Continuous power must remain below 5 W to avoid exceeding TJ = 175°C.
How does SMB10J26CAH differ from SMBJ26CA in terms of surge capability?
SMB10J26CAH delivers 1000W peak pulse power (PPK) versus SMBJ26CA's 600W rating-reflecting a 67% higher surge energy absorption capacity. Both share identical VWM (26V) and VC (42.1V), but SMB10J26CAH sustains clamping at 23.8A vs. SMBJ26CA's 14.3A, enabling robust protection against longer-duration or higher-current transients such as ISO 7637-2 Pulse 5a without derating.
SMB10J26CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMB10J
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 23.8A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J26CAH FAQ
1.How can I place an order for SMB10J26CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J26CAH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMB10J26CAH reliable?
The price and inventory of SMB10J26CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J26CAH is usually 5 days.
3.What payment methods are accepted for SMB10J26CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J26CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J26CAH?
SMB10J26CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J26CAH order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMB10J26CAH?
For technical support, including SMB10J26CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J26CAH requirements.
6.How does Aetrix verify that SMB10J26CAH is sourced from the original manufacturer or authorized distributors?
All SMB10J26CAH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMB10J26CAH meets industry standards.
7.What is the process for return or replacement of SMB10J26CAH?
All SMB10J26CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J26CAH, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMB10J26CAH part is unused and in its original packaging.
Return procedure for SMB10J26CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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